зеркало из https://github.com/mozilla/gecko-dev.git
67 строки
2.9 KiB
Python
67 строки
2.9 KiB
Python
# The contents of this file are subject to the Mozilla Public License Version
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# 1.1 (the "License"); you may not use this file except in compliance with the
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# License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
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# the specific language governing rights and limitations under the License.
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#
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# The Original Code is the Python XPCOM language bindings.
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#
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# The Initial Developer of the Original Code is ActiveState Tool Corp.
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# Portions created by ActiveState Tool Corp. are Copyright (C) 2000, 2001
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# ActiveState Tool Corp. All Rights Reserved.
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#
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# Contributor(s): Mark Hammond <MarkH@ActiveState.com> (original author)
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#
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# test_weakreferences.py - Test our weak reference implementation.
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from xpcom import components, _xpcom
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import xpcom.server, xpcom.client
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num_alive = 0
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class koTestSimple:
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_com_interfaces_ = [components.interfaces.nsIInputStream]
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def __init__(self):
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global num_alive
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num_alive += 1
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def __del__(self):
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global num_alive
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num_alive -= 1
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def close( self ):
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pass
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def test():
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ob = xpcom.server.WrapObject( koTestSimple(), components.interfaces.nsIInputStream)
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if num_alive != 1: raise RuntimeError, "Eeek - there are %d objects alive" % (num_alive,)
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# Check we can create a weak reference to our object.
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wr = xpcom.client.WeakReference(ob)
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if num_alive != 1: raise RuntimeError, "Eeek - there are %d objects alive" % (num_alive,)
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# Check we can call methods via the weak reference.
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if wr() is None: raise RuntimeError, "Our weak-reference is returning None before it should!"
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wr().close()
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ob = None # This should kill the object.
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if num_alive != 0: raise RuntimeError, "Eeek - there are %d objects alive" % (num_alive,)
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if wr() is not None: raise RuntimeError, "Our weak-reference is not returning None when it should!"
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# Now a test that we can get a _new_ interface from the weak reference - ie,
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# an IID the real object has never previously been queried for
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# (this behaviour previously caused a bug - never again ;-)
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ob = xpcom.server.WrapObject( koTestSimple(), components.interfaces.nsISupports)
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if num_alive != 1: raise RuntimeError, "Eeek - there are %d objects alive" % (num_alive,)
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wr = xpcom.client.WeakReference(ob, components.interfaces.nsIInputStream)
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if num_alive != 1: raise RuntimeError, "Eeek - there are %d objects alive" % (num_alive,)
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wr() # This would die once upon a time ;-)
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ob = None # This should kill the object.
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if num_alive != 0: raise RuntimeError, "Eeek - there are %d objects alive" % (num_alive,)
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if wr() is not None: raise RuntimeError, "Our weak-reference is not returning None when it should!"
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test()
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print "Weak-reference tests appear to have worked!"
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